incorrect levelling of the magnetic needle loss of magnetism of the needle presence of magnetic substances near the instrument friction of the needle at the pivot
Answer Discuss in Comment
"Scientists dream about doing great things. Engineers do them."
PSC Advertisement ⏩ | Federal PSC | Bagmati PSC | PSC Karnali | PSC Lumbini | PSC Sudurpaschim | PSC Gandaki | PSC State 1.